Press Esc at the indicated screen, then enter one of the following codes:
God mode: Anypainless
Toggle fogging: Anyfogging
Drive faster: Drivingchantastic
Toggle time limit: Drivingfreeze
Snow: Drivingsnow
Drive only with tires: Drivingsusonly
All weapons: Actionweapons
Electric mode: Actionshocked
Move camera: Anyfollowme
All weapons: Shootingweapons
Infinite ammo: Shootingammo
Toggle auto-reload: Shootingautoreload
Toggle auto-fire: Shootingautofire
Slow enemies: Shootingslowmo
Infinite ammo: Actionammo
Freeze enemies: Actionfreeze
Toggle auto-targeting: Actiontargeting
Toggle laser sight: Actionlaser
Walk through walls: Actionghost
Super jumps: Actionfollowterrain
Skeleton mode: Actionmrbones
Slow rockets: Shootingslowrocket
Drive through walls: Drivingghost
Infinite nitro: Drivingnitro
First person view: Actionfps
More blood: Actionfragyuck
Small heads: Actionpillowmode
Big heads: Actionbighead